On this site, commentary on HRBC Connect API (HRBC API) is stated.

★ ★ Notice of changing scope ★ ★
From 2019/02/01 (Friday), we will release HRBC Connect API Guide without signing in.
Note that the host name of the request URI is not disclosed on the HRBC Connect API Guide,
API connection information to contracted company We will inform you accordingly at the time of delivery.
※ There is no change in the specification of the HRBC Connect API itself.